Rising protein costs

Any idea if/when the rising costs of milk proteins (specifically whey) are going to slow down? Optimum is now $43 for a 5 pounder when a year ago it was 25 bucks. Has Optimum hinted that more price increases are on the way? Also, has anyone looked into egg white as a viable alternative? The only egg protein powder I have seen is the Optimum version, and it has always been relatively expensive.